Nearly a billion gallons of treated sewage are released into the Pacific Ocean every day .Although the wastew-ater is filtered, it still contains contaminants that settle onto the ocean floor.

• 每天有将近十亿加仑处理过的污水排入太平洋。废水虽然经过过滤，但还是含有污染成分，最后沈淀在海底。